Pump adapter for vacuum-resistant connection of suctions hoses to garden pumps and high-pressure pumps for domestic use. Adapter is ideal for pumps with 1″ connecting thread (33.3 mm) and 3/4″ or 1″ hoses. Includes union nut, hose clamp, washer and check valve. Check valve can be used in submersible pumps or submersible pressure pumps to prevent water flowing back into the pump. Otherwise, a washer is used instead of the check valve.